{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{S[table-format=1.3]S[table-format=1.3]S[table-format=1.3]S[table-format=1.3]}}
\toprule
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                    &\multicolumn{1}{c}{\specialcell{Dictator \\ Game}}&\multicolumn{1}{c}{\specialcell{Trust \\ Game 1}}&\multicolumn{1}{c}{\specialcell{Trust \\ Game 2}}&\multicolumn{1}{c}{\specialcell{Social \\ Proximity}}\\\midrule
\midrule
Constant            &      0.3331\sym{***}&      0.3166\sym{***}&      0.3861\sym{***}&      0.5194\sym{***}\\
                    &    (0.0106)         &    (0.0142)         &    (0.0069)         &    (0.0116)         \\
\addlinespace
Same ethnicity      &      0.0177\sym{***}&      0.0389\sym{***}&      0.0038         &      0.0844\sym{***}\\
                    &    (0.0055)         &    (0.0060)         &    (0.0028)         &    (0.0071)         \\
\addlinespace
Same ethnicity $\times$ Hydrocortisone&      0.0015         &     -0.0178\sym{**} &     -0.0021         &     -0.0052         \\
                    &    (0.0074)         &    (0.0084)         &    (0.0041)         &    (0.0101)         \\
\addlinespace
Same gender         &      0.0040         &     -0.0077         &      0.0026         &      0.0404\sym{***}\\
                    &    (0.0052)         &    (0.0059)         &    (0.0028)         &    (0.0068)         \\
\addlinespace
Same gender $\times$ Hydrocortisone&     -0.0042         &      0.0086         &     -0.0013         &     -0.0168\sym{*}  \\
                    &    (0.0071)         &    (0.0085)         &    (0.0042)         &    (0.0095)         \\
\addlinespace
Same age group      &      0.0045         &      0.0469\sym{***}&     -0.0119\sym{*}  &      0.0079         \\
                    &    (0.0106)         &    (0.0138)         &    (0.0068)         &    (0.0123)         \\
\addlinespace
Same age group $\times$ Hydrocortisone&     -0.0045         &      0.0017         &     -0.0005         &     -0.0029         \\
                    &    (0.0080)         &    (0.0093)         &    (0.0046)         &    (0.0106)         \\
\addlinespace
Matched player is Luo&     -0.0001         &      0.0050         &      0.0001         &      0.0073         \\
                    &    (0.0048)         &    (0.0056)         &    (0.0028)         &    (0.0054)         \\
\addlinespace
Matched player is Kikuyu&     -0.0009         &      0.0042         &     -0.0032         &     -0.0020         \\
                    &    (0.0048)         &    (0.0053)         &    (0.0028)         &    (0.0053)         \\
\addlinespace
Matched player is Luhya&      0.0008         &      0.0038         &     -0.0008         &      0.0136\sym{**} \\
                    &    (0.0049)         &    (0.0055)         &    (0.0029)         &    (0.0058)         \\
\addlinespace
Matched player is female&      0.0035         &      0.0122\sym{***}&      0.0016         &      0.0180\sym{***}\\
                    &    (0.0036)         &    (0.0043)         &    (0.0021)         &    (0.0047)         \\
\addlinespace
Matched player is middle-aged&      0.0166\sym{*}  &      0.0630\sym{***}&     -0.0075         &     -0.0350\sym{***}\\
                    &    (0.0098)         &    (0.0133)         &    (0.0065)         &    (0.0108)         \\
\addlinespace
Matched player is old&      0.0329\sym{***}&      0.0817\sym{***}&     -0.0026         &     -0.0378\sym{***}\\
                    &    (0.0102)         &    (0.0138)         &    (0.0067)         &    (0.0118)         \\
\midrule
Participants        &     {1,784}         &     {1,784}         &     {1,784}         &     {1,784}         \\
Decisions per participant&         {6}         &         {6}         &        {30}         &         {4}         \\
Decisions           &    {10,704}         &    {10,704}         &    {53,520}         &     {7,136}         \\
\bottomrule
\multicolumn{5}{p{.8\hsize}}{\footnotesize \textit{Notes}: This table presents the full regression output of our main specification. All terms are described in the text. In this specification, we control for the interaction of a same-gender and same-age group indicator with hydrocortisone as well as gender, age group and ethnicity fixed effects of both players. Social proximity refers to the average measures of likelihood to be friends, trust and closeness rescaled to lie between 0 and 1. Standard errors clustered at the participant level are reported in parentheses. Significance is denoted by \sym{*} \(p<0.1\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\).}\\
\end{tabular}
}
